US3379813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for forming arcuate rigid plastic plate
Assignee: National Gypsum Co
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Filing: 1965-03-01
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Granted: 1968-04-23
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Expires: 1985-03-01
Abstract
No abstract record available.
Inventors
- 👤 Arthur C Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:36
CPC Classifications
B; B44; B44B; B44B5/00; B44B5/02; B44B5/026; B29; B29C; B29C33/00; B29C33/38; B29C33/3842; B29C33/3857; B29C33/3878
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |